Eurostars project, MOSAIC,9507, Obducat Technologies

Purpose and goal

Nanoimprint technique was used to transfer the AR nanostructures onto DSSC panels to increase the conversion efficiency. The AR nanostructures were successfully transferred onto the 100mm×100mm DSSC panels and the conversion efficiency reached ~7%. However, such imprinting cannot be performed directly onto the 918mm×580mm DSSC panels, due to a intrinsic height depth on the panels, which leads to panel cracking as applied imprint pressure. Therefore the imprinting was performed onto a polymer film, which will be adhered onto the DSSC panels via a UV-curable adhesive resin by Orion.

Expected results and effects

The scale-up of imprinted AR structures was done on a 2860mm×540mm polymer film and there was a 177mm nonpatterned gap between each patterned domain (445mm×445mm) of 5 domains. The used nickel stamp was produced by welded 4 pieces of small nickel stamps together, the seam line is 250µm wide. Due to the stamp can be easily damaged at edges during imprint, a spacer was developed to hold the nickel stamp at the position, which resulted in a nonpatterned gap between each domain. The film was shipped to Orion in order to verify the performance. Nano AR has proven to increase the efficiency in PV cells.

Planned approach and implementation

The project was performed as a transnational project with Korean companies. At the time of the project start the project manager in Sweden was of Korean heritage and communication was quite smoothly arranged. In the middle of the project we were forced to change project manager, and that have had a negative impact on the Communication making the progress in the project slower. The slower communication delayed the project more than needed, so In a new project there will be more focus in establishing English as mandatory language for all participants.